Which one of the following dams is built across Betwa river?

Luv Kush Barrage
Rihand Dam
Sharda Barrage
Rajghat Dam

The correct answer is (d). Rajghat Dam is a dam on the Betwa River in the Indian state of Madhya Pradesh. It is located about 100 km from the state capital, Bhopal. The dam was built between 1961 and 1965 and is used for irrigation, flood control, and hydroelectric power generation.

The other options are incorrect.

(a) Luv Kush Barrage is a barrage on the Son River in the Indian state of Bihar. It is located about 100 km from the state capital, Patna. The barrage was built between 1958 and 1962 and is used for irrigation, flood control, and water supply.

(b) Rihand Dam is a dam on the Son River in the Indian state of Uttar Pradesh. It is located about 200 km from the state capital, Lucknow. The dam was built between 1954 and 1962 and is used for irrigation, flood control, and hydroelectric power generation.

(c) Sharda Barrage is a barrage on the Sharda River in the Indian state of Uttar Pradesh. It is located about 300 km from the state capital, Lucknow. The barrage was built between 1961 and 1964 and is used for irrigation, flood control, and water supply.